Well, by definition if it has blue egg genes, it's an Easter egger. Am I seeing feathered legs? And a single comb? could be someone's olive egger. the best way to tell would be to ask the person the egg came from what the choices are.

there is feathers on the outside of its legs, it's from a coworker and she has no idea what the roo is. She has a lot of various easter egger type chickens, I believe she has 18 total right now and she isn't sure which one laid it